mirror of
git://git.sv.gnu.org/coreutils
synced 2026-05-17 12:27:13 -04:00
Eric Blake
a99c35b04d
* doc/coreutils.texi (Common options): Not all utilities reject option abbreviations. * src/chroot.c (main): Report correct name on failure. * src/echo.c (usage): Clarify long option usage. * src/setuidgid.c (usage): Likewise. * src/hostid.c (usage): Condense.
117 lines
3.1 KiB
C
117 lines
3.1 KiB
C
/* chroot -- run command or shell with special root directory
|
|
Copyright (C) 95, 96, 1997, 1999-2004, 2007-2009
|
|
Free Software Foundation, Inc.
|
|
|
|
This program is free software: you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation, either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
|
|
|
/* Written by Roland McGrath. */
|
|
|
|
#include <config.h>
|
|
#include <getopt.h>
|
|
#include <stdio.h>
|
|
#include <sys/types.h>
|
|
|
|
#include "system.h"
|
|
#include "error.h"
|
|
#include "long-options.h"
|
|
#include "quote.h"
|
|
|
|
/* The official name of this program (e.g., no `g' prefix). */
|
|
#define PROGRAM_NAME "chroot"
|
|
|
|
#define AUTHORS proper_name ("Roland McGrath")
|
|
|
|
void
|
|
usage (int status)
|
|
{
|
|
if (status != EXIT_SUCCESS)
|
|
fprintf (stderr, _("Try `%s --help' for more information.\n"),
|
|
program_name);
|
|
else
|
|
{
|
|
printf (_("\
|
|
Usage: %s NEWROOT [COMMAND [ARG]...]\n\
|
|
or: %s OPTION\n\
|
|
"), program_name, program_name);
|
|
fputs (_("\
|
|
Run COMMAND with root directory set to NEWROOT.\n\
|
|
\n\
|
|
"), stdout);
|
|
fputs (HELP_OPTION_DESCRIPTION, stdout);
|
|
fputs (VERSION_OPTION_DESCRIPTION, stdout);
|
|
fputs (_("\
|
|
\n\
|
|
If no command is given, run ``${SHELL} -i'' (default: /bin/sh).\n\
|
|
"), stdout);
|
|
emit_bug_reporting_address ();
|
|
}
|
|
exit (status);
|
|
}
|
|
|
|
int
|
|
main (int argc, char **argv)
|
|
{
|
|
initialize_main (&argc, &argv);
|
|
set_program_name (argv[0]);
|
|
setlocale (LC_ALL, "");
|
|
bindtextdomain (PACKAGE, LOCALEDIR);
|
|
textdomain (PACKAGE);
|
|
|
|
initialize_exit_failure (EXIT_FAILURE);
|
|
atexit (close_stdout);
|
|
|
|
parse_long_options (argc, argv, PROGRAM_NAME, PACKAGE_NAME, Version,
|
|
usage, AUTHORS, (char const *) NULL);
|
|
if (getopt_long (argc, argv, "+", NULL, NULL) != -1)
|
|
usage (EXIT_FAILURE);
|
|
|
|
if (argc <= optind)
|
|
{
|
|
error (0, 0, _("missing operand"));
|
|
usage (EXIT_FAILURE);
|
|
}
|
|
|
|
if (chroot (argv[optind]) != 0)
|
|
error (EXIT_FAILURE, errno, _("cannot change root directory to %s"),
|
|
argv[optind]);
|
|
|
|
if (chdir ("/"))
|
|
error (EXIT_FAILURE, errno, _("cannot chdir to root directory"));
|
|
|
|
if (argc == optind + 1)
|
|
{
|
|
/* No command. Run an interactive shell. */
|
|
char *shell = getenv ("SHELL");
|
|
if (shell == NULL)
|
|
shell = bad_cast ("/bin/sh");
|
|
argv[0] = shell;
|
|
argv[1] = bad_cast ("-i");
|
|
argv[2] = NULL;
|
|
}
|
|
else
|
|
{
|
|
/* The following arguments give the command. */
|
|
argv += optind + 1;
|
|
}
|
|
|
|
/* Execute the given command. */
|
|
execvp (argv[0], argv);
|
|
|
|
{
|
|
int exit_status = (errno == ENOENT ? EXIT_ENOENT : EXIT_CANNOT_INVOKE);
|
|
error (0, errno, _("cannot run command %s"), quote (argv[0]));
|
|
exit (exit_status);
|
|
}
|
|
}
|